Affected: Go standard library crypto/x509

A certificate with a URI which has a IPv6 address with a zone ID may incorrectly satisfy a URI name constraint that applies to the certificate chain. Certificates containing URIs are not permitted in the web PKI, so this only affects users of private PKIs which make use of URIs.

Affected: Ubuntu:22.04:LTS: golang-1.22, Ubuntu:24.04:LTS: golang-1.22

Kyle Seely discovered that the Go net/http module did not properly handle sensitive headers during repeated redirects. An attacker could possibly use this issue to obtain sensitive information. (CVE-2024-45336)

Juho Forsén discovered that the Go crypto/x509 module incorrectly handled IPv6 addresses during URI parsing. An attacker could possibly use this issue to bypass certificate URI constraints. (CVE-2024-45341)

It was discovered that the Go crypto module did not properly handle variable time instructions under certain circumstances on 64-bit Power (ppc64el) systems. An attacker could possibly use this issue to expose sensitive information. (CVE-2025-22866)

It was discovered that the Go http/httpproxy module did not properly handle IPv6 zone IDs during hostname matching. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-22870)

Takeshi Kaneko discovered that the Go net/http module did not properly strip sensitive proxy headers during redirect requests. An attacker could possibly use this issue to obtain sensitive information. (CVE-2025-4673)